9-14 September 2018
University of Ferrara
Europe/Rome timezone
23RD INTERNATIONAL SPIN SYMPOSIUM

Measurement of the J/psi photoproduction cross section close to threshold

11 Sep 2018, 15:50
20m
A10 (Polo degli Adelardi - Via Adelardi, 33)

A10

Polo degli Adelardi - Via Adelardi, 33

Parallel Sessions Low Energy Spin Physics with Lepton, Photon and Hadron Probes Low Energy Spin Physics with Lepton, Photon and Hadron Probes

Speaker

Eugene Chudakov (Jefferson Lab)

Description

We will present preliminary results for the J/psi close-to-threshold photoproduction obtained in the GlueX experiment at Jefferson Lab. Close-to-threshold photoproduction gamma+p-->J/psi+p probes small-size gluon configuration in the proton. This reaction may also contain a contribution from the s-channel production of the LHCb pentaquark P(4.4)-->J/psi+p at beam energies of about 10 GeV. Measuring the size of the contribution allows to evaluate, or put a limit on the branching ratio of the decay P-->J/psi+p. The GlueX experiment is in the process of collecting data. The main research topic is the spectroscopy of light mesons produced by a linearly polarized photon beam with the end point of 12 GeV.

Primary author

Eugene Chudakov (Jefferson Lab)

Presentation Materials